Eclipse Maya Editor 4.0.1

i have installed eclipse 3.2 / pydev. then copy jar file downloaded to /usr/lib/eclipse/plugins but it didn't showed up in preferences>>maya editor preferences (like u have shown in tut) i tried extracting the plugin manually but it still didn't showed up in preferences, no luck for preferences i tried going to preferneces>> plugin dev>>target platform, the plugin is listed there in plugins and loaded (checkbox ON). now it really confuses me,